Boiler-furnace.



P.. JACKSON. BOILER PURNACE.

8 SHEETS-S 1HE Nonms Psrsxs co., wnunycmw, n. cA

PATENTBD 00T. z3, 1906.

N0. 834,058. PATENTED'OGT. 23, 1906.

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BOILER FURNAGB.

APPLICATION FILED NOV.1, 1905. v

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'Arro/M/Eysv Tn: Noem: PETER: co., wAsHmcroN. n. c,

No. 834,058. i PATENTED 00123, 1905. P.JA0KsoN.- B'QILER PURNACE.

APPLICATION' FIVLED NOV. l. 1905.

6 SHEETS-SHEETS.

WITNESSES.'

A TTOHNEYS TH: NoRRls PETER: co., wAsnmaTaN, n. c,

10.834.058. A PATBNTBD 0017.23, 1906.

,12. JACKSON. BOILBR PURNACB.

APPLICATION FILED HOY/.1, 1905..

A TTURNE YS rn: Nomus Fermes co., wsnmcron, v. c.

6 SHEETS-SHEET 5.

, l No. 834,058..

PATENTED OCT. 23, 1906.

P. JACKSON. BOILER FURNACE.

APPLIGATION FILED Nov. 1. v1905.

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v No. 834,058.

UNITED STATES vPATENT oEEIoE.

PEROY JACKSON, OF MACON, GEORGIA, ASSIGNOR TOV J. S. SCHOFIELDS SONSCO.,-OF MACON, GEORGIA.

BOILER-FURNACE.

The object of the invention is to provide a new and improvedboiler-furnace capable of using coal, mill refuse, bagasse and the likeas a fuel and arranged to insure a complete combustion-of the burningfuel and to utilize the heat to the fullest advantage with a view toeconomize in fuel and to quickly generate steam without danger ofburning the boiler-shell.

vThe invention consists of novel features and parts and combinations ofthe same, which will be more fully described hereinafter and thenpointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in which`similar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the improvement arran ed for burningcoal and like fuel. Fig. 2 i's a ongitudinal sectional side elevation ofthe same. Fig. 3 is a transverse section lof the same on the line 3 3 ofFig. 2. Fig. 4 is a like view ofthe same, on the line 4 4 of Fig. 2.Fig.` 5 is a longitudinal sectional side elevation of the improvement asarranged for burning mill-refuse, bagasse, and like fuel. Fig. 6 is across-section of the same on the line 6 6 of Fig. 5, and Fig. 7 is asimilar view of the same on the line 7 7 of Fig. 5.

` In,the improved boiler-furnace illustrated in Figs. 1. 2, 3, and 4 theheat-generator A is connected at its rear end by a'connectingchamber Bwith the rear end of a steam-generatorl C, provided on its top with asteamdome D, and `at its front end with a smokestack E. rIhesteam-generator C is hung on eyebolts F, connected with asuitably-constructed frame G for-supporting the steamgenerator O whollyindependent of the heatgenerator A and directly above the same toeoonomize in space, as will be readily understood by reference to thedrawings.

The heat-generator A,the connecting-charnv ber B, and thesteam-generator O are provided wth envelops of a non-heat-penetratingconstruction, so that the heat is confined Specification of LettersPatent.

Application led November 1, 1905. Serial N o. 285,450.

Patented Oct. 23,v 1906.

kwithin the saiddevices without danger of 'loss of heat by leakage orradiation, it being understood that the heat generated in theheatgenerator A passes from the rear end thereof into theconnecting-chamber B, in which the heat rises to iinallypass through theiiues O of the steam-generator C into'the smokestack E.

The heat-generatorl A is lprovided with a cylindrical metallic casing H,having an interior lining I, the upper portion of which is made offire-brick, while the lower portion is made of ordinary brick, asplainlyindicated in Figs. 3 and 4. A acking J, of asbestos, cement, or likenon-fieat-conducting 'material, is placed between the casing II and theupper or fire-brick portion ofthe lining I to prevent all escape of heatfrom the interior of the heat-generator A through possible spaces orcracks that may form between ad-I jacent iire-clay bricks of the lining.As shown, the bricks for the lining I are disposed radially, so as toform an exceedingly-strong and durable envelop for the heat-generator A.In the front portion of the heat-generator A is arranged a fire-box K,provided with a grate K and an ash-pit K2, having a bottom K3 made ofconcrete or like material, access to the re-boX Kvbeing had by the usualfire-door K4, through which the coal or other fuel is introduced. Thebridge-'wall L for the rear end of the fire-box K is provided in itslower portion with openings L', connecting the rear end of the ash-pitK2 with the front end of an air-duct N, built in the rear portion of theheat generator A and extending through the connecting-chamber B to theoutside or outer end ofthe said duct N, being controlled by a door N toadmit more or less air to the said duct. When the boiler-furnace` is inoperation, atmospheric air can pass through the duct N and openings Linto the ash-pit K2 to then rise through the grate K v made somewhatless in diameter than the for-` IOO ward portion, which contains thenre-box K, it being understood, however, that the said reduced rearportion is sufliciently large to readily accommodate the heat and gasespassing from the fire-box K, over the bridgewall L, through the reducedportion and over 'the roof of the duct N into the connectingchamber B.Now the gases in their passage through the reduced portion of theheat-generator A heat the roof of the duct N, so that the air passingthrough the said duct is highly heatedbefore it reaches the openings Land the ash-pit K2, and this highly-heated air when passingifinto thefuel greatly facilitates the combustion thereof.

The connecting-chamber B has its wall or envelop of anon-heat-penetrating construction, and for this purpose a metallic shellO is provided, having an interior lining O, the inner face of which ispreferably of iire-brick, as plainly indicated in Fig. 2. A manhole O2is arranged in the rear wall of the connecting- 'chamber B to permitconvenient access to the interior of the connecting-chamber B and theheat-generator A.

The steam-generator C is provided with a metallic shell C2, containingthe usual boilerheads, in which the ends of the iiues C are fastened inthe usual manner, and the said shell C2 is provided with an envelop ofanonheat-penetrating construction, preferably in the form of a coveringP, of asbestos or other non-heat-conducting material. The feedwater pipeQ connects with the interior of the shell C2 in the usual manner.

By the construction shown and described it is evident that the heatgenerated in the heat-generator A is not liable to radiate or leakthrough the envelop, but passes into the connecting-chamber B, alsoarranged to prevent loss of heat by leakage or radiation, the heatfinally passing into the rear ends of the flues C and through the sameto heat the water contained within the shell C2 and surrounding theiiues C. The flues C are comparatively small in diameter and are placedeX- ceedingly close together to provide a very large heating-surface toinsure a rapid generation of steam, it being expressly understood thatthe shell C2 of the heat-generator Ais not subjected directly to theheat generated in the heat-generator A, owing to the nonheat-penetratingenvelops of both the heatgenerator A and the steam generator C. Thus along life is insured to the shell C2 and danger from explosion isreduced to a minimum, as the entering of cold feed-water is not liableto strike an overheated part of the shell C2, as the latter is notsubjected directly to the heat generated in the heat-generator A.

For burning mill refuse, bagasse, and like fuel the air-duct N ispreferably dispensed with, (see Figs. 5, 6, and 7,) and theheatgenerator is preferably made double, as indicated by A and A2, andin this case the shell H for the heat-generator is elongated incross-section, as plainly shown in Fig. 6, and the lining I is arrangedto form a central longitudinal partition to divide the heat-generatorinto two parts, each having its own 'lirebox K5 similar, however, to theconstruction above shown and described, so that further detaileddescription of the same is not deemed necessary, it being, however,understood that the rear end of the double heatgenerator A dischargesthe heat and gases into the single connecting-chamber B similar to thechamber B and delivering the heat and gases through the smoke-lines inthe single steam-generator C3, provided with the steam-dome D and thesmoke-stack E. The steam-generator C5 is hung by eyebolts F from a frameG similar to the frame' G above described in reference to Figs. l, 2, 3,and 4, so that further description of the same is not deemed necessary.The steam-generator C5 is in its detail construction like thesteamgenerator C and is also provided with a pipe Q for supplyingfeed-water to the said steamgenerator.

As shown in Figs. 5 and 6, the rear portion of each heat-generator A orA2 is reduced relative to the front portion thereof containing the{ire-box K5.

For burning sawmill refuse, bagasse, and the like it is desirable tomake the rear portion, which forms the combustion-chamber ofconsiderable length, to facilitate the combustion of the fuel during itspassage from the fire-box K5 into the connecting-chamber B.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A boiler-furnace provided with a heatgenerator,comprising a cylindrical envelop closed at the front end and open at therear end, the envelop having a lining of a nonheat-penetrating material,a fire-box in the front end of the envelop, a bridge-wall built withinthe said envelop, and an air-duct eX- tending in through the rear end ofthe envelop to the said bridge-Wall to connect with openings thereinleading to the ash-pit of the fire-box.

2. A boiler-furnace provided with a heatgenerator, comprising acylindrical envelop closed at the front end and open at the rear end,the envelop having a lining of a nonheat-penetrating material, afire-box in the front end of the envelop, a bridge-wall built within'the said envelop, and an air-duct extending in through the rear end ofthe envelop to the said bridge-wall to connect with openings thereinleading to the ash-pit of the fire-box, the said air-duct having itsroof arched and its ends abutting on the said lining.

3. A boiler-furnace, comprising a heatgenerator having an envelop ofnon-heat- IIO conducting .materiaL a steam -generator wholly independentof the said heat-generator and having an envelop of anon-heat-conducting material, the rear portion of the saidheat-generator being reduced in diameter, a connecting-chamber forconnecting the rear ends of the said generators with each other, thesaid connecting-chamber having its wall of a non-heat-conductingmaterial, land an air-duct having an arched roof and extending throughthe reduced portion of theheat-generator and the connecting-chamber andopening into the ash-pit of the heat-generator.

4. A boiler-furnace provided with a heat generator having a tubularenvelop of a nonheat-penetrating construction, the front portion of theenvelop containing the fire-box and the rear portion being reduced indiameter and forming a combustion-chamber, an apertured bridge-wallbetween the iire-box and V- combustion chamber, a connectingchamber intowhich opens the rear end of the said heat-generator, an air-duct havingan arched roof and extending from the bridgewall through the combustionand connecting chambers and communicating with thel ashpit of theheat-generator through the apertures of the bridge-wall, and asteam-generator whollyr independent of the said heat-generator and havinone end opening into the said connectin -c amber.

5. A boilerrnace, comprising a steamgenerator, a heat-generator belowthe steamgenerator and having a fire-box vin its front portion and acombustion-chamber in its rear portion and provided with an aperturedbridge-wall, the combustion-chamber being reduced in diameter, a chamberat the rear of the steam and heat generators and connect'- ing thesame,` and an air-conduit having an arched Wall and extending from thebridgewall through the connecting-chamber` and provided with a closureat its outer end.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.` Y PERCY JACKSON. Witnesses:

B. W. HoL'rzeLow, H. C. LAMAR.

